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United States Patent | 5,164,509 |
Atwal | November 17, 1992 |
Novel potassium channel activators of the formula ##STR1## where Y, X, X.sub.1, X.sub.2 (N or O), and R.sub.1 -R.sub.4 are as defined herein, are disclosed.
Inventors: | Atwal; Karnail (Newtown, PA) |
Assignee: | E. R. Squibb & Sons, Inc. (Princeton, NJ) |
Appl. No.: | 618277 |
Filed: | November 26, 1990 |
Current U.S. Class: | 548/126; 548/256 |
Intern'l Class: | C07D 498/04 |
Field of Search: | 548/126,256 |
4575511 | Mar., 1986 | Evans et al. | 514/456. |
4900752 | Feb., 1990 | Seto | 514/364. |
Foreign Patent Documents | |||
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02-004791 | Jan., 1990 | JP. | |
WO91/14690 | Oct., 1991 | WO. |
Mozolis et al., Russian Chemical Reviews, 42 (7), 1973, pp. 587-595. Rasmussen et al., Synthesis, (1988), pp. 456-459. J. M. Evans et al., J. Med. Chem., 1983, 26, 1582-1589. V. A. Ashwood et al., J. Med. Chem., 1986, 29, 2194-2201. |